Method of rolling metal plates



No. 751,801. PATENTBD FEB. 9. 1904.

A. J. MASKREY.

METHOD OF ROLLING METAL PLATES. APPLIOATION FILED unfs. 1903.

N0 MODEL. 3 SHEBg-SHBET 1.

fim A PATENTEDTEBQ 9, 1904.

A. J. MASK-REY.

METHOD OF ROLLING METAL PLATES.

APPLIOATION FILED JAN. 5. 1908.

3 SHEETS-SHEET 2.

N0 MODEL.

[hm/pic);

w: nonms PETERS co, Mmaumo. mswwmoa. n. c.

No. 751,801. PATENTED FEB. 9, 1904.

A. J. MASKRBY. METHOD OF ROLLING METAL PLATES.

APPLICATION FILED JAN. 5, 1903.

N0 MODEL.

3 SHEETSSHEET 3.

min/ewes.-

Inventor lit UNITED STATES Patented February 9, 1904.

PATENT OEEIcE.

METHOD OF ROLLING METAL PLATES.

SPECIFICATION forming part of Letters Patent No. 7 51 ,801, datedFebruary 9, 1904. Application filed January 5, 1903. Serial No. 137,852.(No specimens.)

To all whom it may concern.-

Be it known that I, ARTHUR J AMEs MASK- REY, a subject of the King ofGreat Britain, and a resident of Martins Ferry, county of Belmont, andState of Ohio, have invented certain new and useful Improvements inMethods for Rolling Metal Plates, of which the following is aspecification.

My invention relates to a method of rolling thin metal sheets; and itsobject is to provide a method of working the metal whereby the handlingof the sheets is greatly facilitated, rendering it possible to economizelabor, time, and fuel, and consequently materially reducing the cost ofproduction.

I am aware that others have produced various methods of rolling sheetmetal wherein a system of furnaces and continuous rolls are used; butwith such methods the continuous feature is carried too far, since it isimpossible in the rolling of thin sheets to keep the metal at a properheat through a long series of continuous rolls, and this is fatal to thesuccess of a continuous mill.

In my invention I confine myself to as few rolls in a series as possibleand stop the operation after rolling the bars into sheets, reheat them,and roll them out in two or more thicknesses in the same set of rolls.By this means I get a good length on the pack before doubling and by sodoing am enabled to keep the rolls in more even temper. This relievesthe excessive work on the finishing-rolls, as the reheating of the packafter the first pass through the short series of rolls renders said packlonger when rolled the second time than as if said pack had beencontinued through a longer series and had not been reheated. In acontinuous mill with a long series of rolls without reheating the packwould be much shorter after doubling, and this would be fatal toproducing successful work in the last pairs of finishing-rolls. Theshorter the pack before the final rolling the greater the amount,

of reduction necessary in the finishing-rolls to bring the sheets to theproper length, the greater the difficulty in separating the finishedsheets, and the greater the liability of making waster-sheets.

In describing my invention reference is had to the accompanyingdrawings, illustrating the machine which I employ in carrying out mymethod, wherein Figures 1 and 1 taken together, show a top plan view ofthe machine or mill, illustrating the arrangement thereof. Fig. 2 is acrosssection of the continuous reducing-rolls, taken on the line 2 2,Fig. 1; and Fig. 3 is a similar section on line 3 3, Fig. 1, showing theconveyers for returning the partly-reduced product to the furnaces.

Referring to said drawings, in which like reference numerals designatelike parts throughout the several views, 1 indicates the fly-wheel, and2 the disk or crank for driving the rolls of the mill, and 3 indicatesthe center line of the engine furnishing motive power thereto.

4, 4, 4 and 4 represent the respective pairs of rolls of a continuousset of reducingrolls, which set will hereinafter be referred to as 5,said rolls being in alinement. Between each pair of said rolls are liverollers, or, if preferred, endless conveyer-chains 6. Saidreducing-rolls are all driven from themain or fly-wheel shaft 7 throughgear-wheels 8, provided on the respective shafts of the rolls,counter-shafts 9 being provided between the shafts of the rolls 4 and 4and the rolls 4 and 4, respectively. Suitable shaft-couplings 10 areprovided for driving said rolls from the I gear-wheels 8. Coupled to oneof the reducing-rolls of the continuous set 5, preferably to the roll 4,in order to eliminate undue strain, is the shaft 11 of two sets offinishingrolls 12 and 12.

13 and 14 indicate the respective positions or ground plans of a foldingdevice or doubler and of shears for trimming off the ends of the sheetsof metal after passing through the set 5 of continuous reducing-rolls.

15 indicates a set of live rollersor endless chains, which are elevatedover the shaft 11, as shown in Figs. 1 and 3, for returning the sheetsor packs which have passed through the set 5 of reducing-rolls, saidlive rollers being located in a position for delivering the sheets orplates at a point between the respective working positions of theheaters for. the running-over furnace and the finishingfinishing-rolls.

18 indicates a double bar-heating furnace, 19 a double running-overfurnace, and 20 a double finishing-furnace, all said furnaces being ofsuitable construction and preferably arranged in a row or line, asshown, in front of the reducing-rolls and at a right angle to thealinement of the set 5, so as to be convenient to their respectivefeeding positions.

22 indicates the line or position of the overhead trolley or trackagefor carrying the heated bars from the respective doors of thebar-heating furnace 18 to the leading pair A of the continuous set 5.

As illustrated, the set 5 of continuous rolls are located in front ofthe running-over furnace 19, so as to be as convenient as possiblethereto when the sheets are removed therefrom for the second rolling. Asis obvious, since the sheets from the running-over furnace 19 will coolmuch more readily and quickly than the bars from the bar-heating furnace18, I secure in this manner a most advantageous arrangement.

Now the method which I employ for forming plates or sheets from abar ofmetal is as follows: The heated bars of metal in one of the barheatingfurnaces, 18, are removed to the leading-rolls A of the continuous set5. Being fed into said rolls, the bars are carried forward separatelybymeans of the said rolls and the live rollers or chains 6 until theyemerge from the rolls A. The bars will then have beenrolled down toabout the same thickness as is done in the present method in a singlemill in four or five passes. Having passed through this series of rollsthe pieces will have become chilled to such an extent that a furtherrolling Without reheating is impracticable. I therefore take up thesepieces andplace them on the conveyer 15, by which they are returned tothe running-over furnace and are deposited on the floor at 22. At thispoint they are matched in two, three, or four thicknesses, according tothe thickness desired for the finished sheet, and are placed in one ofthe running-over furnaces, where they are at once reheated. Re-

moved from this furnace they are again run through the continuous set 5in two, three, or four thlcknesses, according to the thickness desiredfor the finished sheets, and emerging fromthe rolls 4: the pack isopened, matched together again in two, three, or four thicknesses, asdesired, and placed on the folding device 13, where they are doubled.After doubling the ends of the packs are squared up by the shears, whichare in line with the live rollers or conveyers 15 at the rear endthereof. The pack is then placed on said rollers and is conveyed to themill-floor at 22, where it is taken up and placed in thefinishing-furnace. Being reheated therein, the sheets are finishedthrough the finishing-rolls by a series of passes therethrough, thisfinal passing being done in the ordinary manner.

As is obvious, immediately one side of the furnace 18 is emptied it mayagain be refilled with bars to be heated, and at the same time theheated bars in theother side of the fur nace may be fed through thereducing-rolls 5. Each of the other furnaces may be operated in likemanner, thus utilizing the heat of the furnace to the greatest possibleextent, and

consequently effecting a considerable saving in fuel, much of which hashitherto passed off in unutilized heat. I

It will further be seen that by my method only three furnacesarenecessary to do the work which has hitherto in the ordinary methodrequired four, thus effecting a still further saving of fuel.

Having thus described my method of rolling metal sheetsor plates,what Iclaim as new, and desire to secure by Letters Patent, is-

The method of producing sheets from a bar of metal which consists infirst heating the bar and passing it through a short series ofreducing-rollsarranged in tandem, returning the partly-reduced productto a reheatingfurnace, reheating the product, passing it through saidshort series of reducing-rolls a second time in a plurality ofthicknesses,open ing the pack, matching the sheets thereof togetheragain in a plurality of thicknesses, doubling the pack, returning saidpack to a reheating-furnace, reheating it, and finishing the sheets inpacks by a series of passes through the finishing-rolls, substantiallyas described.

Signed by me at Wheeling, West Virginia, this 2d day of January, 1908.

ARTHUR JAMES MASKREY.

Witnesses:

H. E. DUNLAP, GEORGE H. DIERINGER.

